US20030025661A1 - Display device - Google Patents

Display device Download PDF

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Publication number
US20030025661A1
US20030025661A1 US10/208,679 US20867902A US2003025661A1 US 20030025661 A1 US20030025661 A1 US 20030025661A1 US 20867902 A US20867902 A US 20867902A US 2003025661 A1 US2003025661 A1 US 2003025661A1
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United States
Prior art keywords
electrodes
pixel
liquid crystal
display device
crystal display
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Abandoned
Application number
US10/208,679
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English (en)
Inventor
Gerardus Karman
Mark Johnson
Sjoerd Stallinga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Koninklijke Philips NV
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Koninklijke Philips Electronics NV
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Publication date
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Assigned to KONINKLIJKE PHILIPS ELECTRONICS N.V. reassignment KONINKLIJKE PHILIPS ELECTRONICS N.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: JOHNSON, MARK THOMAS, KARMAN, GERARDUS PETRUS, STALLINGA, SJOERD
Publication of US20030025661A1 publication Critical patent/US20030025661A1/en
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G09G3/3659—Control of matrices with row and column drivers using an active matrix the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G02F1/134309—Electrodes characterised by their geometrical arrangement
    • G02F1/134363—Electrodes characterised by their geometrical arrangement for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1343—Electrodes
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
    • G02F1/1362—Active matrix addressed cells
    • G02F1/13624—Active matrix addressed cells having more than one switching element per pixel
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0261—Improving the quality of display appearance in the context of movement of objects on the screen or movement of the observer relative to the screen

Definitions

  • the invention relates to a liquid crystal display device comprising a nematic liquid crystal material between two substrates, one of which is provided with a matrix of selection electrodes and data electrodes with a pixel at the area of a crossing of the selection electrodes and data electrodes, and at least a switching element and drive means for driving the selection electrodes and data electrodes.
  • Examples of such active matrix display devices are the TFT-LCDs or AM-LCDs used in laptop computers and organizers and based on a nematic effect such as the twisted-nematic effect, the in plane switching effect or, for example, the vertically aligned effect.
  • a problem in such display devices is the comparatively slow switching speed of the pixels; a typical switching period for the liquid crystal molecules is 10-100 msec when switching an electric field. When the electric field is switched off, the periods are usually even longer because the switch-off times are substantially entirely determined by relaxation times. This is notably detrimental when displaying moving images.
  • the pixel therefore comprises at least three electrodes and the drive means are provided with means for generating, in operation, electric fields in two mutually different directions.
  • Two mutually substantially perpendicular fields are preferably generated.
  • the invention is based on the recognition that the switching speed of a pixel depends on the torque exerted by an electric field on the (directors of the) liquid crystal molecules.
  • a field exerting a large torque at that instant a high switching speed can always be achieved, which speed is higher than the switching speed in the case of two electrodes per pixel. Since such a torque can also be generated during switching off, the switch-off time is independent of or hardly dependent on relaxation times.
  • the drive means comprises means for bringing a pixel between two drive periods to a defined state (reset).
  • a first preferred device comprises a pixel between two substrates, wherein a first substrate comprises two electrodes at the location of the pixel, with a longitudinal direction at an angle.
  • This embodiment is suitable for the in plane switching effect in which a liquid crystal material with a negative dielectric anisotropy is used.
  • the angle is preferably substantially 90 degrees in this case, and the first substrate at the location of the pixel is further provided with a substantially L-shaped electrode.
  • a first substrate comprises two electrodes at the location of the pixel and the second substrate is provided with at least a further electrode.
  • the first substrate comprises two electrodes at the location of the pixel, each electrode being provided with a respective switching element having the selection electrodes in common. If necessary, the switching elements have different switching voltages.
  • the first substrate may comprise two electrodes at the location of the pixel, each electrode being provided with a respective switching element connected to different selection electrodes.
  • FIGS. 1 and 2 show the effect on which the invention is based
  • FIG. 3 is a plan view of picture electrodes in a conventional display device and in a display device according to the invention
  • FIG. 4 shows the operation of the invention in the device of FIG. 3, while
  • FIG. 5 shows a variant of a display device according to the invention
  • FIG. 6 is an electrical equivalent of a part of a display device according to the invention.
  • FIG. 7 shows a detail of FIG. 6,
  • FIGS. 8 to 10 shows variants of FIG. 7.
  • a change of transmission or reflection is obtained because a liquid crystal molecule rotates under the influence of an electric field.
  • the electric field may be supplied transversely to the direction of the substrates or in a direction parallel to the substrates (referred to as In Plane Switching).
  • the switching period of such a display device depends, inter alia, on the viscosity of the liquid crystal material used and the strength of the electric field used.
  • FIG. 3 a is a plan view of picture electrodes 7 , 8 on a substrate, in which the electrode 8 is connected to a fixed voltage, for example, earth, in a conventional display device for the in plane switching effect in which switching takes place between different optical states by means of electric fields which are directed substantially parallel to the substrate and is therefore referred to as “horizontal electric field display” in which the effect described above occurs.
  • FIG. 3 b is a plan view of picture electrodes 8 , 9 , 10 on a substrate, in which the electrode 8 is again connected to a fixed voltage, for example, earth, in a display device according to the invention.
  • the picture electrode 8 is L-shaped, while voltages V 1 ,V 2 can be supplied by means of the picture electrodes 9 , 10 .
  • V 1 ,V 2 By connecting the electrode 9 to a voltage V 1 >0 and the electrode 10 to earth, an electric field, indicated by lines 11 , is generated.
  • an electric field, indicated by lines 11 is generated. Fields of different directions and sizes can be applied by means of mutually different voltages V 1 ,V 2 .
  • FIG. 4 shows how the molecules 3 switch in an accelerated manner according to the invention.
  • the voltages V 1 ,V 2 are adjusted in such a way (V 2 >0, V 1 >0) that ⁇ is about 45° again and the torque is maximal (instant t 3 , the angle between the electric field 2 and the X axis is about 65°).
  • the molecule 3 now continues to rotate rapidly.
  • V 1 ,V 2 in such a way that the torque remains maximal (instant t 4 , the angle between the electric field 2 and the X axis is about 45°)
  • the rotation through 90 degrees of the molecules 3 is completed.
  • V 1 ,V 2 can always be adjusted in such a way that the reverse torque remains maximal when a switching back to the original situation takes place. This switching back has thereby become an actively driven process which is no longer determined by the relaxation time of the liquid crystal molecules.
  • FIG. 3 b shows the electrodes on a first substrate.
  • the liquid crystal molecules are present between this substrate and a second substrate. If desired, one or more (transparent) electrodes may be present on this second substrate.
  • the dynamic drive described is not limited to the in plane switching effect but may also be used, for example, on display devices 16 (FIG. 5) that are based on the twisted-nematic effect ( ⁇ >0) or on the vertically aligned nematic effect (VAN).
  • the liquid crystal material 15 is present between two substrates 14 , 14 ′.
  • the electrodes 8 , 9 on the substrate 17 are suitable for generating electric fields 11 in a direction parallel to the substrates 14 , 14 ′, while electric fields 12 can be applied by means of these electrodes and one or more counter electrodes 10 on the substrate 14 ′ in a direction transverse to these substrates.
  • By suitable choice of the voltages on the various electrodes switching on as well as switching off can be accelerated (dynamic drive) similarly as described above.
  • FIG. 6 shows an electrical equivalent of a part of a display device 1 to which the invention is applicable. It comprises a matrix of pixels 20 at the area of crossings of row or selection electrodes 17 and column or data electrodes 18 , 19 .
  • the row electrodes are consecutively selected by a row driver 21 , while the column electrodes are provided with data via a data register 22 .
  • incoming data 23 are first processed in a processor 24 , if necessary with a signal-processing unit 25 .
  • Mutual synchronization between the row driver 21 and the data register 22 takes place via drive lines 26 .
  • Drive signals from the row driver 21 select the picture electrodes 9 , 10 (FIG. 3 b ) via thin-film transistors (TFTs) 30 , 31 whose source electrodes are electrically connected to the column electrodes 18 , 19 .
  • the signals at the column electrodes 18 , 19 are transferred via the TFTs 30 , 31 to picture electrodes 9 , 10 , coupled to the drain electrode, of a pixel 20 .
  • the third electrodes of the pixels 20 (electrode 8 in FIG. 3) are connected to earth, but they may be alternatively connected to a variable voltage.
  • the thin-film transistors (TFTs) 30 , 31 as well as the associated connections are shown diagrammatically by way of circles 30 ′, 31 ′.
  • FIG. 7 shows how, for a part of a pixel that is comparable with that of FIG. 3 b, voltages V 1 ,V 2 are applied to the column electrodes 18 , 19 for the picture electrodes 9 , 10 by selecting the associated TFTs 30 , 31 via the gate electrodes 32 by means of the row electrode 17 . Since in this case each electrode must be provided with separate voltages, a number of column electrodes that is twice as large in comparison with the conventional active matrix drive based on TFTs must be provided.
  • the parts of a pixel that are comparable with those of FIG. 3 b are separately selected via the gate electrodes 32 , for example, directly after each other for half a selection period, while voltages V 1 ,V 2 are again applied during the respective selections to the column electrode 18 for the picture electrodes 9 , 10 .
  • a number of row electrodes ( 17 , 17 ′) that is twice as large in comparison with the conventional active matrix drive based on TFTs must be provided. Since the number of rows in a display device is generally smaller than the number of columns (typically a factor of 4), a smaller quantity of extra drive electronics is required in this case than in the configuration of FIG. 7. In both cases, the same type of transistor, for example, an amorphous silicon TFT, is sufficient.
  • each picture electrode 9 , 10 (FIG. 3 b ) is selected via thin-film transistors (TFTs) 30 , 31 , whose gate electrodes 32 are connected in an electrically conducting manner to the row electrodes 17 and the source electrodes are connected to the column electrodes 18 in this case.
  • the row selection signal is shown as a signal which is divided during a line selection period t sel into two substantially equal parts t sel1 and t sel2 , with different selection voltages V b , V a .
  • this row selection signal may be realized as, for example, a ramp voltage. The transistors switch due to a switching voltage difference at different row selection voltages.
  • the row voltage now first gets such a high value (in this example) that both transistors are turned on.
  • electrode 10 still switches on at the highest selection voltage V b at the row electrode 17 ; both electrodes then get the voltage V 1 .
  • the voltage at the row electrode 17 and hence at the gate electrodes 32 decreases to a value at which the transistor 31 associated with electrode 10 is turned off or is hardly conducting.
  • Electrode 10 is now insulated and conveys the voltage V 1 .
  • t sel2 with selection voltage V a at the row electrode 17 After t sel , electrode 9 is also insulated and conveys the voltage V 2 . In a subsequent (sub-)address period, different voltages are applied to the electrodes 9 , 10 , so that the process depicted in FIG. 4 is passed through. Since, due to the use of the extra electrode, the molecules rotate much more rapidly than in conventional drive modes, a selection period may consist of a plurality of sub-selection periods or a frame period may consist of a plurality of sub-frames so that a plurality or all of the stages of the process depicted in FIG. 4 are passed through, for example, within the conventional selection period or frame period.
  • TFTs thin-film transistors
  • a resistive or capacitive division may be applied alternatively, as is shown diagrammatically in FIG. 10 by means of the network 33 .
  • a small change of the grey value of the pixel may sometimes suffice to switch only once within a frame period; this decreases the dissipation.
  • the voltages to be used for the electrodes 9 , 10 depend, inter alia, on the previous transmission value and the new transmission value of the pixel, the liquid crystal effect used, the temperature and other system properties. Based on these factors, the voltages to be used can be determined by means of signal processing in the processor 24 , using, for example, a frame memory, a look-up table, a microprocessor, or the like. The application permitting, the signal processing may only speed up switching on or off.
  • the invention is of course also applicable to reflective and transflective display devices, while several drive mode variations are also possible.
  • the driving fields may be alternatively generated and curved at different angles.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mathematical Physics (AREA)
  • Optics & Photonics (AREA)
  • Theoretical Computer Science (AREA)
  • Geometry (AREA)
  • Computer Hardware Design (AREA)
  • Liquid Crystal (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
US10/208,679 2001-08-01 2002-07-30 Display device Abandoned US20030025661A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP01202917.9 2001-08-01
EP01202917 2001-08-01

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US20030025661A1 true US20030025661A1 (en) 2003-02-06

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US (1) US20030025661A1 (de)
EP (1) EP1415192A1 (de)
JP (1) JP2004537752A (de)
KR (1) KR20040030871A (de)
CN (1) CN1537255A (de)
WO (1) WO2003012537A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060072048A1 (en) * 2002-11-14 2006-04-06 Jung-Hee Lee Liquid crystal display and thin film transistor array panel therefor
EP1674925A1 (de) * 2004-12-23 2006-06-28 Quanta Display Inc. Flüssigkristallanzeigen mit verbesserter Graustufe
US20060145983A1 (en) * 2004-12-31 2006-07-06 Dong-Hoon Lee Liquid crystal display device
US20060279684A1 (en) * 2005-06-14 2006-12-14 Boe Hydis Technology Co., Ltd. Fringe field switching mode LCD
US20060285047A1 (en) * 2005-06-17 2006-12-21 Quanta Display Inc. Vertical alignment type liquid crystal displays
US20070195042A1 (en) * 2004-04-13 2007-08-23 Koninklijke Philips Electronics, N.V. Liquid Crystal Display Device
EP1860490A1 (de) * 2006-05-26 2007-11-28 Au Optronics Corporation Flüssigkristallanzeigen mit vertikaler Ausrichtung
US7358945B2 (en) 2004-05-28 2008-04-15 Au Optronics Corp. Liquid crystal displays with improved gray-scale
US20130342774A1 (en) * 2006-04-27 2013-12-26 Lg Display Co., Ltd. Array Substrate for In-Plane Switching Mode Liquid Crystal Display Device and Method of Driving Display Device Having the Same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101003623B1 (ko) * 2004-12-31 2010-12-23 엘지디스플레이 주식회사 횡전계 모드 액정표시장치
KR101247113B1 (ko) * 2005-11-22 2013-04-01 삼성디스플레이 주식회사 표시장치

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5852486A (en) * 1996-12-30 1998-12-22 Hoke, Jr.; Clare L. Liquid crystal display with alternative electrode structure
US5914761A (en) * 1993-09-20 1999-06-22 Hitachi, Ltd. Liquid crystal display device with at least one of insulating layer and orienting film
US5977562A (en) * 1995-11-14 1999-11-02 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device
US6097465A (en) * 1996-03-01 2000-08-01 Semiconductor Energy Laboratory Co., Ltd. In plane switching LCD with 3 electrode on bottom substrate and 1 on top substrate
US6285428B1 (en) * 1997-04-18 2001-09-04 Hyundai Electronics Industries Co., Ltd. IPS LCD having molecules remained parallel with electric fields applied
US20020018166A1 (en) * 2000-07-05 2002-02-14 Kimikazu Matsumoto Liquid crystal display device and method of fabricating the same
US6700558B1 (en) * 1999-09-24 2004-03-02 Sharp Kabushiki Kaisha Liquid crystal display device and displaying method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW262553B (de) * 1994-03-17 1995-11-11 Hitachi Seisakusyo Kk
JP3775089B2 (ja) * 1999-01-22 2006-05-17 セイコーエプソン株式会社 液晶装置および電子機器
JP2001142073A (ja) * 1999-11-05 2001-05-25 Koninkl Philips Electronics Nv 液晶表示装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5914761A (en) * 1993-09-20 1999-06-22 Hitachi, Ltd. Liquid crystal display device with at least one of insulating layer and orienting film
US5977562A (en) * 1995-11-14 1999-11-02 Semiconductor Energy Laboratory Co., Ltd. Electro-optical device
US6097465A (en) * 1996-03-01 2000-08-01 Semiconductor Energy Laboratory Co., Ltd. In plane switching LCD with 3 electrode on bottom substrate and 1 on top substrate
US5852486A (en) * 1996-12-30 1998-12-22 Hoke, Jr.; Clare L. Liquid crystal display with alternative electrode structure
US6285428B1 (en) * 1997-04-18 2001-09-04 Hyundai Electronics Industries Co., Ltd. IPS LCD having molecules remained parallel with electric fields applied
US6700558B1 (en) * 1999-09-24 2004-03-02 Sharp Kabushiki Kaisha Liquid crystal display device and displaying method thereof
US20020018166A1 (en) * 2000-07-05 2002-02-14 Kimikazu Matsumoto Liquid crystal display device and method of fabricating the same

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7652725B2 (en) * 2002-11-14 2010-01-26 Samsung Electronics Co., Ltd. Liquid crystal display and thin film transistor array panel therefor
US20060072048A1 (en) * 2002-11-14 2006-04-06 Jung-Hee Lee Liquid crystal display and thin film transistor array panel therefor
US8228452B2 (en) 2002-11-14 2012-07-24 Samsung Electronics Co., Ltd. Liquid crystal display and thin film transistor array panel therefor
US20100149447A1 (en) * 2002-11-14 2010-06-17 Samsung Electronics Co., Ltd. Liquid crystal display and thin film transistor array panel therefor
US20070195042A1 (en) * 2004-04-13 2007-08-23 Koninklijke Philips Electronics, N.V. Liquid Crystal Display Device
US7358945B2 (en) 2004-05-28 2008-04-15 Au Optronics Corp. Liquid crystal displays with improved gray-scale
EP1674925A1 (de) * 2004-12-23 2006-06-28 Quanta Display Inc. Flüssigkristallanzeigen mit verbesserter Graustufe
US20060145983A1 (en) * 2004-12-31 2006-07-06 Dong-Hoon Lee Liquid crystal display device
US8866713B2 (en) * 2004-12-31 2014-10-21 Lg Display Co., Ltd. Liquid crystal display device
US20060279684A1 (en) * 2005-06-14 2006-12-14 Boe Hydis Technology Co., Ltd. Fringe field switching mode LCD
US7545470B2 (en) * 2005-06-14 2009-06-09 Hydis Technologies Co., Ltd Fringe field switching mode LCD with first and second pixel electrodes each having a plurality of slits where the second electrodes are positioned between the first electrodes at a predetermined angle
US20060285047A1 (en) * 2005-06-17 2006-12-21 Quanta Display Inc. Vertical alignment type liquid crystal displays
US20130342774A1 (en) * 2006-04-27 2013-12-26 Lg Display Co., Ltd. Array Substrate for In-Plane Switching Mode Liquid Crystal Display Device and Method of Driving Display Device Having the Same
US8934065B2 (en) * 2006-04-27 2015-01-13 Lg Display Co., Ltd. Array substrate for in-plane switching mode liquid crystal display device and method of driving display device having the same
EP1860490A1 (de) * 2006-05-26 2007-11-28 Au Optronics Corporation Flüssigkristallanzeigen mit vertikaler Ausrichtung

Also Published As

Publication number Publication date
KR20040030871A (ko) 2004-04-09
WO2003012537A1 (en) 2003-02-13
JP2004537752A (ja) 2004-12-16
CN1537255A (zh) 2004-10-13
EP1415192A1 (de) 2004-05-06

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